Hillary didn't pay for the pee tapes. Christopher Steele did. The Democratic Party requested that their lawyers obtain opposition research. The law firm contracted with Fusion GPS, and the funds to pay Fusion came from the law firm's trust account. Hillary didn't even know about the pee tapes, the DNC immediately handed the report over to the RNC, and didn't use ANY of it.
Because the information it contained showed that Donald Trump was a danger to national security, rather than use the information politically, they gave it to the RNC. That was the responsible thing to do.
Quite the contrast to Trump who tried to get the Ukrainians to falsely announce an investigation into the Bidens in order to boost his re-election chances. Who tried to promote forged evidence found on "Hunter's Laptop" to the House and Senate and the American people as evidence of the Bidens' corruption.
The FBI's investigation into national security threats posed by the Trump Campaign's ties to Russia, has never been released and that investigation was halted by Trump's DOJ.